Let there be light

In full-LED headlights 70 diodes are involved in the road illumination - the dazzling other motorists is avoided by shading device

After about 100 years, the bulb is in car headlights before they are replaced. "In the future makes the light emitting diode (LED), the race", is Uwe Constance, head of the Mercedes-Lighting technology, sure. The reasons are obvious: For brightness, lifetime and power consumption, the lamps of the new generation of conventional technology are far superior.

The light color of the LED is located at 5500 degrees Kelvin, which is close to daylight. So night driving will be less tiring, and accidents due to poor visibility, can be avoided. for seven years, Audi is working hard on this issue. Wolfgang Huhn, Head of "Light and Sight" at Audi, raves about the efficiency: "LED keep loose 10,000 operating hours without aging and set the energy in productive light to. "Today, LEDs reach four times more energy efficient than halogen headlights. "And by 2018 this will be better as much as eight times," predicts chicken. So then even more and much brighter lit LED are incidentally contribute to fuel savings. However, this is not yet the case.

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Current full-LED headlights generate a lot of waste heat that must be removed, for example, with cooling fans. But the development of the digital light is rapidly: Every two years is a performance increase of 30 percent possible, expect lighting engineers Hella high. the first white LED achieved 18 lumens per watt (these are the horsepower of light), so there are already huge 100 lumens - and even a bit more than can provide xenon headlights. Another advantage of the digital light is the flexibility in terms of brightness and light distribution. Because unlike conventional lamps, the light arises here is not due to friction in the filament, but by the electron transition in different layers of a semiconductor.

Easily retrofitted: Guides daytime running lights

Thanks electrical control of the individual diodes of a full LED headlamp and fog and cornering light can be generated this way. The trick: by camera-based shading device technology can be adapted even so that a blinding of other motorists is excluded the light distribution.
Holger Ippen